lunar phases power point.

1. Moon Phases
A look at the movements
of the Moon

2. Movements of the Moon
• Revolution – Moon orbits
the Earth every 271/3 days
• The moon rises in the east
and sets in the west
• The moon rises and sets
50 minutes later each day
• Rotation – Moon turns on
its axis every 27 days
• Same side of Moon
always faces Earth

3. It’s Just a Phase
• Moonlight is reflected
sunlight
• Half the moon’s surface is
always reflecting light
• From Earth we see
different amounts of the
Moon’s lit surface
• The amount seen is called
a “phase”

4. Limb
The line where the
surface of the moon
meets the sky.
Terminator
The imaginary line between
he reflected light and
hadow.

6. Waxing and Waning
• New moon l s ( hir qua t r
a t t d) r e
wa Moon
ning
• Waxing Crescent moon m orb `s
oon it
erh
at
• First Quarter moon SUN
cr s nt
e ce gibb sm
ou oon
• Waxing Gibbous moon e rt
a h
• Full moon
fl m
u l oon
• Waning Gibbous moon
ne m
w oon
• Third Quarter moon
• Waning Crescent moon cr s nt
e ce
gib ousm
b oon
• New moon w x Moon
a ing f s qu r e
ir t a t r

7. FOUR MAIN SHAPES
FULL CRESCENT
QUARTER GIBBOUS

10. Orbits (revolves around)
Earth every 27.3 days
Elliptical orbit (not a perfect circle)
• About 384,000 km
(240,000 miles)
from Earth
360,000 km 406,000 km
10 224,000 miles 252,000 miles

11. Moon rise times:
The New Moon always rises at sunrise.
The first quarter Moon rises at noon.
The Full Moon rises at sunset.
The last quarter Moon rises at midnight.
Moonrise takes place about 50 minutes later each
day than the day before.

13. Name this phase!
Full Moon
What time does this phase rise and set?

14. Is this line the limb or
terminator?
Limb
Terminator
Is this line the limb
or terminator?

15. Name this phase!
First Quarter

16. Name this phase!
Waxing Crescent

17. Name this phase!
Waning
Gibbous

18. Name this
phase!
Third Quarter

19. From what direction does
the moon rise?
The East

20. Name this phase!
Waxing Gibbous

21. Name this phase!
Waning Crescent

22. Is this line the limb or
the terminator?
Limb

23. Name this phase!
Look closely!
Waxing Gibbous

24. Name this phase!
Full Moon

25. Name this phase!
New Moon

26. Does the moon rise or set in the west?
It sets in the west.

27. Name this phase!
Waning Gibbous

28. Name this
phase!
Waning Crescent

29. Photo resources
• http://www.nasm.si.edu/apollo/AS15/a15images.htm
• http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-m
• http://clementine.cnes.fr/index.en.html
• http://cass.jsc.nasa.gov/pub/research/clemen/clemen.htm
• http://spaceflightnow.com/news/n0108/15mooncreate/
• http://seds.lpl.arizona.edu/nineplanets/nineplanets/pxmoo

30. More photo resources
• http://www.nrl.navy.mil/clementine/clemovies/clemovies
• http://www.solarviews.com/eng/moon.htm
• http://news.bbc.co.uk/1/hi/sci/tech/620649.stm
• http://skyandtelescope.com/observing/objects/eclipses/ar
• http://lunar.arc.nasa.gov/results/ice/eureka.htm
• http://www.space.com/scienceastronomy/solarsystem/mo
Leesa Hubbard
Teacher in Residence
Sally Ride Science